3.2 Keyboard and display
Fig. 3.1 shows the LC-display with matrix of the Prolevel FMC 661, Fig. 3.3 its front panel.
Table 3.1 below describes the function of the operating keys.
• Changes are not possible if the matrix has been locked (Section 4.6).
• Non-flashing parameters are either read-only indications or locked entry fields.
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PROLEVEL
FMC 671
123.4
1A
1B
2A
2B
3
HV
+
E
_
VH
0 0
Measured value display
4 yellow limit relay LEDs
•lit, relay energised
Parameter entry keysRed alarm relay LED
• Lights on fault condition,
relay de-energises
• Flashes on warning
relay remains energised
Matrix selection keys
Communications indicator
Matrix position indicator
BA142_24
10-step segmented display
showing percentage
0/4 …20 mA signal
Current underflow/overflow
indicator
Green operational LED
• Lights in normal operation
Fig. 3.3:
Front panel of the
Prolevel FMC 661 transmitter
The transmitter is also available
without the keyboard
Keys Function
Matrix selection
•
Press V to select the vertical position.
•
Press H to select the horizontal position
•
Press simultaneously to select the measured value field, V0H0
Parameter entry
•
Select the digit to be changed.
The digit at the extreme left is selected and flashes.
•
Move to the next digit by pressing »
⇒
« again. When the last digit
is reached »
⇒
« selects the leftmost digit again.
•
To change the position of the
decimal point
, press down both
»
⇒
« and »+«. The decimal point moves 1 space to the right.
•
Increases the value of the flashing digit
•
Decreases the value of the flashing digit
•
To e n t e r a
negative number
decrease the leftmost digit until a
minus sign appears in front of it
•
Press »E« to register entry.
•
Unregistered entries remain ineffective and the instrument will
operate with the old value.
+
+
Table 3.1:
Prolevel FMC 661
Parameter entry and display keys
Chapter 3: Controls Prolevel FMC 661
20 Endress+Hauser
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